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 ###Instrução: Na pista Showevent Olympiastadion München, onde o piloto vencedor é Bruno Spengler, qual é a posição de pole?
 ###Tabelas: CREATE TABLE race_calendar_and_results (race_calendar_and_results_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Circuit VARCHAR, Date VARCHAR, Pole Position VARCHAR, Fastest Lap VARCHAR, Winning Driver VARCHAR, Winning Team VARCHAR) CREATE TABLE standings_pool_b (standings_pool_b_id AUTO_INCREMENT PRIMARY KEY, Skip (Club) VARCHAR, W INT, L INT, PF INT, PA INT, Ends Won INT, Ends Lost INT, Blank Ends INT, Stolen Ends INT) CREATE TABLE 2012_ladder (2012_ladder_id AUTO_INCREMENT PRIMARY KEY, Peel VARCHAR, Wins INT, Byes INT, Losses INT, Draws INT, Against INT) CREATE TABLE 20th-_and_21st-century_swiss_confederation_issues (20th-_and_21st-century_swiss_confederation_issues_id AUTO_INCREMENT PRIMARY KEY, Location VARCHAR, Date INT, Denomination VARCHAR, Coinage metal VARCHAR, Mintage INT, KM number VARCHAR) CREATE TABLE championship_game_results_by_team (championship_game_results_by_team_id AUTO_INCREMENT PRIMARY KEY, Appearances INT, School VARCHAR, Wins INT, Losses INT, Percent VARCHAR, Last Appearance VARCHAR)  
SELECT Pole Position FROM race_calendar_and_results WHERE Winning Driver = Bruno Spengler AND Circuit = Showevent Olympiastadion München